Search string in a file python

Developers often need to access and manipulate data in files, whether reading from them or writing into them. Hey guys! I earn a full-time income online and on MaschiTuts I gladly share with you guys how I stay on top of the game! I do this full-time and wholeheartedly. In fact, the moment I stopped working an 8-to-5 job and finally got into online business as a digital entrepreneur, is problably one of the best decisions I ever took in my life.

And I would like to make sure that YOU can get on this path as well! And it all starts right here.. Strings in Python In Python, strings have the type str. Then iterates over each line in the file one by one and for each line check if it contains the given string or not.

If the line contains the given string, then return True. Whereas if no line in the file contains the given string, then it returns False. Here we get to know that file contains the given string or not. But what if we want to know all the exact occurrences of a string in the file like lines and line numbers.

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We use cookies to ensure you have the best browsing experience on our website. Start Your Coding Journey Now! Login Register. Then we can use the in operator to check whether the string is in the returned string.

A simple find method can be used with the read method to find the string in the file. The find method is passed the required string. It returns 0 if the string is found and -1 if the string is not found.